Yes it happened to me too! Not just once, but twice. The first time was an invite confirmation that was due to computer issues and the second time was an actual invite and they said they were having computer issues as well. I hope they get it resolved soon, cause its so bad. I would feel bad for someone who gets an "accidental acceptances."

For the first question on the supplemental, did you guys just responded with yes/no? I felt like I elaborated on them on the third question of the supplemental. Also for the second question did you guys just list your shadowing experiences or elaborated on what you observed etc?